What is displacement in 3D modeling shading?

Displacement in 3D modeling shading is a technique that uses texture or heightmap data to physically modify a mesh’s surface geometry, creating real depth. Unlike bump mapping (which only fakes depth with normals), it moves vertices to produce true shadows and details like skin pores, fabric wrinkles, or rocky terrain. Common uses include: - VFX/Games: Realistic character skin, environmental textures. - Product Design: Simulating leather or wood. - ArchViz: Brick walls, textured floors with true depth. For beginners, try a grayscale heightmap in Blender: Apply it to a simple plane, adjust displacement strength, and see how light interacts with the modified mesh.